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Symmetry breaking induced by the parity change in global electromagnetic ion temperature gradient modes

Authors :
Juhyung Kim
Helen H. Kaang
Hogun Jhang
S.S. Kim
Source :
Physics of Plasmas. 25:012505
Publication Year :
2018
Publisher :
AIP Publishing, 2018.

Abstract

We perform a computational study of the effects of finite plasma β(= plasma thermal energy/magnetic energy) on the residual stress in the context of the quasi-linear theory. The five-field electromagnetic (EM) toroidal ion temperature gradient (ITG) model is considered in the realistic tokamak geometry. Analyses show that the residual stress significantly increases and its radial profile changes from a dipolar to a unipolar shape with increasing β. The change in the mode parity is found to be responsible for the enhancement and the profile change of the residual stress driven by the global EM toroidal ITG mode. This finding highlights the importance of the global eigenmode structure in determining the radial profile of the residual stress.

Details

ISSN :
10897674 and 1070664X
Volume :
25
Database :
OpenAIRE
Journal :
Physics of Plasmas
Accession number :
edsair.doi...........349def0a738758588146644261492cc9
Full Text :
https://doi.org/10.1063/1.5006981